Barrel cooling device

Abstract

The present application relates to a kind of barrel type cooling device, including cooling seat, cooling jacket and cooling medium flow pipe, cooling jacket is hollow tubular structure, its front part is fixed in cooling seat, the front tube wall of cooling jacket is equipped with cooling medium inflow groove, cooling medium outflow groove, cooling medium inflow row hole and cooling medium outflow row hole, the front end of cooling medium inflow row hole and outflow row hole is communicated with cooling medium inflow groove and outflow groove respectively, rear end is communicated with annular groove in the rear tube wall of cooling jacket, the front part hole of cooling medium flow pipe is fitted in the inner hole of cooling jacket, middle part is located in cooling jacket and keep interval between cooling jacket, rear part overhang, the front end of cooling medium flow pipe is closed, lateral through-hole is equipped on the front tube wall of cooling medium flow pipe, and lateral through-hole is communicated with cooling medium inflow groove.The present application is used in the end planetary mechanism of thin coal seam coal winning machine rocker arm, can greatly promote the cooling effect of the planetary mechanism even entire coal winning machine rocker arm.

Description

TECHNICAL FIELD

[0001] The present application relates to a cooling device, in particular a forced cooling device for the end transmission mechanism of a thin seam shearer rocker arm. BACKGROUND

[0002] With the complication of mining conditions, such as the increasing occurrence of gangue and faults in mining objects, the frequency of rock cutting is greatly increased, thus the demand for high power of thin seam shearer and the productization are constantly proposed and developed. The power of single rocker arm has been developed from 100KW in the early stage to 500KW at present. The existing high-power rocker arm has the following problems: the compact planetary mechanism is prone to low reliability and short service life due to less internal oil storage and poor heat dissipation; the heating problem of the rocker arm caused by the efficiency loss and oil stirring loss of high power cannot be well solved, and insufficient cooling causes the lubrication effect to be weakened. SUMMARY

[0003] The purpose of the present application is to provide a barrel type cooling device used in the end planetary mechanism of a thin seam shearer rocker arm to improve the cooling effect of the planetary mechanism and the entire shearer rocker arm.

[0004] The main technical scheme of the present application is as follows:

[0005] A barrel type cooling device comprises a cooling seat, a cooling sleeve and a cooling medium flow pipe. The cooling sleeve is a hollow tubular structure. The front part of the cooling sleeve is inserted and fixedly installed in the cooling seat, and the middle and rear parts are overhanging. The front part of the cooling sleeve is provided with a cooling medium inflow groove and a cooling medium outflow groove. The cooling medium outflow groove is communicated with the cooling medium outflow channel in the cooling seat. The cooling sleeve is also provided with a plurality of cooling medium inflow discharge holes and a plurality of cooling medium outflow discharge holes extending forward and backward in the wall of the sleeve. The front ends of the cooling medium inflow discharge holes and the cooling medium outflow discharge holes are communicated with the cooling medium inflow groove and the cooling medium outflow groove respectively. The rear ends of the cooling medium inflow discharge holes and the cooling medium outflow discharge holes are communicated with the annular groove in the rear wall of the cooling sleeve. The front part of the cooling medium flow pipe is fitted and fixedly installed in the inner hole of the cooling sleeve. The middle part of the cooling medium flow pipe is located in the cooling sleeve and is spaced apart from the cooling sleeve. The rear part of the cooling medium flow pipe is overhanging outside the cooling sleeve. The front end of the cooling medium flow pipe is closed. The front wall of the cooling medium flow pipe is provided with a lateral through hole. The lateral through hole is communicated with the cooling medium inflow groove. The rear end of the cooling medium flow pipe and the cooling medium outflow channel in the cooling seat form the cooling medium inflow channel and the cooling medium outflow channel of the barrel type cooling device respectively.

[0006] The inner hole of the cooling sleeve is a stepped hole with a smaller diameter in the front and a larger diameter in the rear. The smaller diameter inner hole section is fitted with the front part of the cooling medium flow pipe.

[0007] The cooling medium inflow groove and the cooling medium outflow groove are both arc grooves extending along the circumference of the cooling jacket, and the groove openings are directed to the radial outer side of the cooling jacket.

[0008] The front pipe wall of the cooling jacket is further provided with a communication hole, which is open on the inner side of the pipe wall of the cooling jacket at one end and communicates with the lateral through hole, and communicates with the cooling medium inflow groove at the other end.

[0009] The inner side of the front pipe wall of the cooling jacket is further provided with an annular groove, and the one end of the communication hole communicates with the lateral through hole through the annular groove.

[0010] The outlet of the cooling medium outflow passage in the cooling seat is connected with a joint, which is arranged along the radial direction of the cooling seat.

[0011] The front part of the cooling jacket is provided with a plurality of first radial seals on the outer surface forming the shaft hole fit with the cooling seat, which are dispersed in front of and behind the cooling medium inflow groove and the cooling medium outflow groove, and the front part of the cooling medium flow passage is provided with a plurality of second radial seals on the inner surface forming the shaft hole fit with the cooling seat, which are dispersed in front of and behind the cooling medium inflow groove and the cooling medium outflow groove.

[0012] The front end of the cooling medium flow passage extends into the cooling seat and is fixedly connected with the cooling seat, and a radial seal is arranged between the surfaces forming the shaft hole fit of the cooling medium flow passage and the cooling seat.

[0013] The outer surface and the inner surface of the middle and rear part of the cooling jacket are both provided with a corrugated structure.

[0014] The corrugated structure adopts a thread, including an outer thread of the cooling jacket and an inner thread of the cooling jacket.

[0015] The beneficial effects of the present application are:

[0016] The barrel-shaped cooling device is installed in the large oil cavity of the planet carrier, the cooling seat is fixedly arranged at the front end of the planet carrier, and the remaining part of the barrel-shaped cooling device is located in the oil cavity of the planet carrier and is immersed in the oil in the oil cavity in the normal working state to forcibly cool the oil, so that the planet mechanism is more fully cooled, and the deficiency of the water jacket cooling of the existing structure of the rocker arm shell of the coal mining machine is made up.

[0017] The barrel-shaped cooling device has a small volume and is installed in the oil cavity of the planet carrier without occupying other additional installation space.

[0018] The joint connected with the outlet of the cooling medium outflow passage in the cooling seat is arranged along the radial direction of the cooling seat and is located between the drum connecting disc and the drum end cover, and compared with the case that the end connecting water outlet joint of the conventional cooling device occupies less axial space, so that the drum is more compact in the axial direction.

[0019] The outlet of the joint can be connected to the water channel of the cooling / spraying system of the drum, so that the water absorbing the heat of the hot oil in the oil cavity of the planet carrier is finally discharged through the cooling / spraying system of the drum, greatly simplifying the composition, structure and installation of the forced cooling system with the barrel-type cooling device as the core, and saving a large amount of space.

[0020] The outer surface and the inner surface of the middle and rear part of the cooling jacket are provided with corrugated structures, which can increase the contact area of the cooling jacket with the oil and improve the cooling efficiency.

[0021] Since the water of the cooling medium flow pipe of the barrel-type cooling device comes from the water jacket of the boom, when the rocker housing is in various different inclination states, most of the barrel-type cooling device is immersed below the oil surface of the oil cavity of the planet carrier, and the planet mechanism can be effectively cooled, so that the operation of the barrel-type cooling device is not affected by whether the rocker housing and the planet mechanism adopt a compartment structure. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 Structure schematic diagram of an embodiment of the present application;

[0023] Figure 2 A-A sectional view of Figure 1

[0024] Figure 3 Installation state schematic diagram of the present application in the end planet mechanism of the rocker of the coal mining machine.

[0025] REFERENCE NUMERALS:

[0026] 44. planet carrier;

[0027] 5. drum; 51. drum connecting disc; 52. drum end cover;

[0028] 62. barrel-type cooling device; 620. cooling medium flow pipe; 6201. lateral through hole; 621. cooling jacket; 6211. cooling medium inflow groove; 6212. cooling medium inflow row hole; 6213. annular groove; 6214. cooling medium outflow row hole; 6215. cooling medium outflow groove; 6216. cooling jacket outer thread; 6217. cooling jacket inner thread; 6218. communication hole; 6219. annular groove; 622. cooling seat; 6222. joint. DETAILED DESCRIPTION

[0029] As Figures 1-3 ​As shown, the present application discloses a barrel type cooling device 62, which comprises a cooling seat 622, a cooling jacket 621 and a cooling medium flow pipe 620. The cooling jacket is a hollow tubular structure, the front part of the cooling jacket is inserted and fixedly installed in the cooling seat, and the middle and rear part is overhanging. The front part of the pipe wall of the cooling jacket is provided with a cooling medium inflow groove 6211 and a cooling medium outflow groove 6215, and the cooling medium outflow groove is communicated with the cooling medium outflow channel in the cooling seat. The pipe wall of the cooling jacket is also provided with a plurality of cooling medium inflow exhaust holes 6212 and a plurality of cooling medium outflow exhaust holes 6214 extending forward and backward, and the front ends of the cooling medium inflow exhaust holes and the cooling medium outflow exhaust holes are communicated with the cooling medium inflow groove and the cooling medium outflow groove respectively, and the rear ends of the cooling medium inflow exhaust holes and the cooling medium outflow exhaust holes are communicated with the annular groove 6213 in the pipe wall of the rear part of the cooling jacket. The front part of the cooling medium flow pipe is fitted and oppositely fixedly installed in the inner hole of the cooling jacket, the middle part is located in the cooling jacket and keeps a spacing with the cooling jacket, and the rear part is overhanging outside the cooling jacket. The front end of the cooling medium flow pipe is closed, and the front part of the pipe wall of the cooling medium flow pipe is provided with a lateral through hole 6201, which is communicated with the cooling medium inflow groove and is used for introducing the cooling medium from the cooling medium flow pipe into the cooling medium inflow groove of the cooling jacket. The rear end of the cooling medium flow pipe and the cooling medium outflow channel in the cooling seat are respectively constructed as the cooling medium inflow channel and the cooling medium outflow channel of the barrel type cooling device. The cooling medium flows into the barrel type cooling device from the rear end of the cooling medium flow pipe, and is discharged from the cooling medium outflow channel in the cooling seat after passing through the lateral through hole, the cooling medium inflow groove on the cooling jacket, the cooling medium inflow exhaust hole, the annular groove, the cooling medium outflow exhaust hole and the cooling medium outflow groove on the cooling jacket in turn.

[0030] The barrel type cooling device can be installed in the oil cavity of the planet carrier 44 of the end planetary mechanism of the shearer rocker arm, the cooling seat is oppositely fixed at the front end of the planet carrier, and the remaining part of the barrel type cooling device is located in the oil cavity of the planet carrier and is always immersed in the oil in the oil cavity in the normal working state to forcibly cool the oil and make the corresponding planetary mechanism be cooled more sufficiently, which makes up for the deficiency of the water jacket cooling of the shearer rocker arm shell.

[0031] Generally, the cooling medium is water. The cooling medium inflow channel of the barrel type cooling device is connected to the water channel of the water jacket on the rocker arm shell, the water in the water jacket is introduced into the barrel type cooling device, and the hot oil in the oil cavity of the planet carrier 44 is effectively exchanged, and then discharged.

[0032] The barrel type cooling device has small volume and is installed in the oil cavity of the planet carrier, which does not occupy other additional installation space.

[0033] Since the water of the cooling medium flow pipe of the barrel type cooling device comes from the arm support water jacket, the barrel type cooling device is mostly immersed in the oil liquid surface of the oil cavity of the planet carrier when the rocker housing is in different inclination states, and the planet mechanism can be effectively cooled, so the working of the barrel type cooling device is not affected by whether the cavity structure is adopted between the rocker housing and the planet mechanism.

[0034] The inner hole of the cooling sleeve can be a stepped hole with a smaller diameter in the front and a larger diameter in the back, wherein the smaller diameter inner hole section forms a shaft hole fit with the front part of the cooling medium flow pipe. The cooling medium inflow groove, the cooling medium outflow groove, and the lateral through hole are all formed on the pipe section of the cooling sleeve that forms a shaft hole fit with the cooling medium flow pipe. The cooling medium inflow groove, the cooling medium outflow groove, and the lateral through hole are preferably located at the same axial position, facilitating groove and hole machining of a single part and sealing between multiple parts.

[0035] In this embodiment, the cooling medium inflow groove and the cooling medium outflow groove are both arc-shaped grooves extending in the circumferential direction of the cooling sleeve, with the groove opening facing the radial outer side of the cooling sleeve.

[0036] Further, a communication hole 6218 is also provided in the front pipe wall of the cooling sleeve, with one end of the communication hole opening on the inner side of the pipe wall of the cooling sleeve and communicating with the lateral through hole, and the other end communicating with the cooling medium inflow groove, so as to guide the cooling medium from the lateral through hole to the cooling medium inflow groove.

[0037] An annular groove 6219 is also preferably provided on the inner side of the front pipe wall of the cooling sleeve, with one end of the communication hole communicating with the lateral through hole through the annular groove. In the case of providing an annular groove, the communication hole and the lateral through hole can communicate without the need for circumferential positioning between the cooling sleeve and the cooling medium flow pipe, thus simplifying assembly. In this embodiment, the lateral through hole is a through hole that penetrates both sides of the pipe wall of the cooling medium flow pipe in the radial direction, so as to increase the flow of cooling medium out of the cooling medium flow pipe.

[0038] The outlet of the cooling medium outflow channel in the cooling seat is connected with a connector 6222, which is arranged in the radial direction of the cooling seat and located between the drum connecting disc 51 and the drum end cover 52 in the installed state. Compared with the case of connecting the outlet water connector at the end of the conventional cooling device, the axial space occupation is smaller, making the drum 5 more compact in the axial direction. The outlet of the connector can be connected to the water path of the cooling / spraying system of the drum, so that the water that absorbs the heat of the hot oil in the oil cavity of the planet carrier is finally discharged through the cooling / spraying system of the drum, greatly simplifying the composition, structure, and installation of the forced cooling system centered on the barrel type cooling device, and saving a large amount of space occupation. The cooling medium outflow channel in the cooling seat can be provided with multiple branches, each branch having an outlet, and each outlet being connected with a connector 6222.

[0039] The front part of the cooling jacket is provided with a plurality of first radial seals on the outer surface of the shaft hole fitting surface of the cooling seat, which are dispersed in front of and behind the cooling medium inflow groove and the cooling medium outflow groove. The front part of the cooling jacket is provided with a plurality of second radial seals on the inner surface of the shaft hole fitting surface of the cooling medium flow pipe, which are dispersed in front of and behind the cooling medium inflow groove and the cooling medium outflow groove.

[0040] The front end of the cooling medium flow pipe extends into the cooling seat and is fixedly connected relative to the cooling seat. The cooling medium flow pipe and the cooling seat are provided with radial seals between the shaft hole fitting surfaces.

[0041] For any one of the barrel type cooling devices described above, the outer surface and the inner surface of the middle and rear part of the cooling jacket are preferably provided with corrugated structures to increase the contact area of the cooling jacket with the oil and improve the cooling efficiency.

[0042] In this embodiment, the corrugated structure is replaced by a thread for the convenience of processing, including the outer thread 6216 of the cooling jacket and the inner thread 6217 of the cooling jacket.

Claims

1. A barrel-shaped cooling device mounting structure, characterized in that: The device includes a planetary mechanism at the end of a coal mining machine rocker arm and a barrel-shaped cooling device. The planetary carrier of the planetary mechanism has an oil chamber. The barrel-shaped cooling device includes a cooling seat, a cooling jacket, and a cooling medium flow pipe. The cooling jacket is a hollow tubular structure. The front part of the cooling jacket is inserted and fixedly installed in the cooling seat, while the middle and rear parts extend outwards. The front wall of the cooling jacket has a cooling medium inlet groove and a cooling medium outlet groove, which communicate with the cooling medium outlet channel in the cooling seat. The cooling jacket also has several cooling medium inlet and outlet holes extending forward and backward within its tube wall. The front ends of the cooling medium inlet and outlet holes communicate with the cooling medium inlet and outlet grooves, respectively, and the rear ends of the cooling medium inlet and outlet holes connect to an annular structure located within the rear wall of the cooling jacket. The cooling medium flow pipe is connected to the cooling sleeve. The front shaft hole of the cooling medium flow pipe is fitted and fixedly installed in the inner hole of the cooling sleeve. The middle part is located inside the cooling sleeve and is spaced apart from the cooling sleeve. The rear part extends out of the cooling sleeve. The front end of the cooling medium flow pipe is closed. The front wall of the cooling medium flow pipe is provided with a lateral through hole. The lateral through hole is connected to the cooling medium inflow groove. The rear end of the cooling medium flow pipe and the cooling medium outflow channel in the cooling seat constitute the cooling medium inflow channel and cooling medium outflow channel of the barrel-shaped cooling device, respectively. The cooling seat is fixed to the front end of the planetary carrier. The rest of the barrel-shaped cooling device is located in the oil cavity of the planetary carrier. Under normal working conditions, the middle and rear parts of the cooling sleeve are always immersed in the oil in the oil cavity. The cooling medium inflow channel is connected to the water channel of the water jacket on the shell of the coal mining machine rocker arm.

2. The installation structure of the barrel-shaped cooling device as described in claim 1, characterized in that: The inner hole of the cooling jacket is a stepped hole with a smaller diameter at the front and a larger diameter at the back, wherein the smaller diameter inner hole section forms a shaft hole fit with the front part of the cooling medium flow pipe.

3. The installation structure of the barrel-shaped cooling device as described in claim 2, characterized in that: Both the cooling medium inflow groove and the cooling medium outflow groove are arc-shaped grooves extending circumferentially along the cooling jacket, with the groove openings facing the radial outer side of the cooling jacket.

4. The installation structure of the barrel-shaped cooling device as described in claim 3, characterized in that: The front tube wall of the cooling jacket is also provided with a connecting hole. One end of the connecting hole opens on the inner side of the tube wall of the cooling jacket and communicates with the lateral through hole, while the other end communicates with the cooling medium inflow tank.

5. The installation structure of the barrel-shaped cooling device as described in claim 4, characterized in that: The inner side of the front tube wall of the cooling jacket is also provided with an annular groove, and one end of the connecting hole communicates with the lateral through hole through the annular groove.

6. The installation structure of the barrel-shaped cooling device as described in claim 2, characterized in that: The outlet of the cooling medium outflow channel in the cooling seat is connected to a connector, which extends radially along the cooling seat and is located between the roller connecting plate and the roller end cover in the installed state.

7. The installation structure of the barrel-shaped cooling device as described in claim 6, characterized in that: Multiple first radial seals are provided on the outer surface of the front part of the cooling jacket that forms a shaft hole fit with the cooling seat. The first radial seals are distributed in front of and behind the cooling medium inlet groove and the cooling medium outlet groove. Multiple second radial seals are provided on the inner surface of the front part of the cooling jacket that forms a shaft hole fit with the front part of the cooling medium flow pipe. The second radial seals are distributed in front of and behind the cooling medium inlet groove and the cooling medium outlet groove.

8. The installation structure of the barrel-shaped cooling device as described in claim 7, characterized in that: The front end of the cooling medium flow pipe extends into the cooling seat and is fixedly connected to the cooling seat. A radial seal is provided between the surfaces of the cooling medium flow pipe and the cooling seat that form a shaft hole fit.

9. The installation structure of the barrel-shaped cooling device as described in claims 1, 2, 3, 4, 5, 6, 7 or 8, characterized in that: The outer and inner surfaces of the middle and rear portion of the cooling jacket are both provided with a corrugated structure.

10. The installation structure of the barrel-shaped cooling device as described in claim 9, characterized in that: The corrugated structure is made of threads, including external threads and internal threads of the cooling jacket.

11. The installation structure of the barrel-shaped cooling device as described in claim 3, 4, or 5, characterized in that: The outlet of the cooling medium outflow channel in the cooling seat is connected to a connector, which extends radially along the cooling seat and is located between the roller connecting plate and the roller end cover in the installed state.

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